Flutter - Firestore stream snapshot with where not streaming when clause arguments are updated

Question

My flutter app is using Firestore as a database. I am listening on a stream for data using this:

Firestore.instance.collection('cars')
          .where("free", isEqualTo: true).snapshots()

The problem with this is that when I change the field free of a car with free: false the stream is not updating, probably because of the where("free", isEqualTo: true) but if I change the field to free: true the stream sends updates...

Answer 1

You probably need to create an index in Firestore.

https://firebase.google.com/docs/firestore/query-data/indexing?authuser=0#create_a_missing_index_through_an_error_message